100 DICTIONARY OF AVIATION
streamline flow, the flow of fluids in or aleng steam- lines or paths of continuous motion of particles.
tube of flow, an imaginary tube bounded by surfaces across which there is no flow or streaming of the particles of a fluid.
flow-line 'ftoo^am n. a line of flow, see under flow. flown f 3LO on v. see fly. flow-system. 'fz,oo,sistim n. a system of flow, such as
streamline flow.
fluke ftouk n. an unexpected stroke. a fluke of wind, a chance breeze. fluky 'ftuu-ki adj. [also spelt flukey] of the nature of a
fluke or chance ; uncertain : as, a *fluky wind. flurry 'fz,Bzi n. [plural flurries]
1. a gust or squall; also, a sudden shower: as, a *f lurry of snow or rain.
2. a sudden rush (of birds).
flush fz,A$ n. a flight of birds suddenly started up.
flutter 'ftAtaz intr. move or flap the wings rapidly without flying much, as a bird; hang upon wing in the air; also, move with a light quivering motion thru the air, as a leaf.
fly ftai v. [past participle flown; indicativ present flies; preterit flew]
1. intr. move thru the air with or as with wings.
2. intr. pass or rise quickly in or thru the air.
3. tr. cause to rise and maintain its position or move in the air : as, to *fly a kite, *fly a balloon, *fly a machine.
4. tr. fly in or thru: as, to *fly the airs; a device for
- fly ing the air.
fly ftai n. [plural flies]
1. (obsolete) the action or fact of flying; flight (sense i).
2. an instance of such action : as, it was an easy *fly. flyabout 'ftai-9,baut n. a vehicle for flying about; an aerial
runabout. flyaway 'fz.ai-9/wee n. [also spelt fly-away] one who flies
away. flyaway 'fz.ai-9,wee n. an easy or overwhelming victory, in
a f lyingscentest ; an aerial walkover. flyer 'ftai-az n. [also spelt flier]
1. a person or an animal that flies; a flying^man or a flying animal.
2. a device such as a vane or wing, ferming part of a flyingsmachine or airship and designed to aid in flight : as, a rotary *flyer for moving a gas^vessel; wheels, pullies, and different *flyers.
3. an apparatus or machine which is designed to fly;
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